Unknown Or OtherNov 4, 2026
MY 2012–2027 · Service Bulletin/Repair Instructions · 98-035
The new 2.1m day cab lift tools, a Level 3 mandatory tool, are now available to order.
EngineOct 30, 2026
MY 2022–2023 · Service Bulletin/Repair Instructions · E335
"RMI procedures have been updated to reduce the risk of progressive damage to the rocker arms. Certain EPA 2021 compliant PACCAR MX-13 engines were built with intake valve springs that could fail. This failure can cause significant damage to the engine. New intake valve springs will be installed. Intake Valve Spring inventory is currently limited and has been placed on reserve status. Dealers must submit a TCS365 case as shown. PACCAR Parts continues to receive regular inventory shipments to the PDCs.["
Electrical SystemOct 30, 2026
MY 2019–2021 · Service Bulletin/Repair Instructions · 43-086
This optional software update is expected to be available after 10/30/2026 for chassis equipped with EMY 2019-2021A PACCAR MX-11 engines. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being offered to customers in alignment with recently updated regulatory agency guidance.
EngineOct 30, 2026
MY 2019–2022 · Service Bulletin/Repair Instructions · E329
Certain chassis equipped with an engine model year 2019 - 2021 PACCAR MX-13 engine are eligible to receive software improvements to increase vehicle uptime and emissions fault detection. This software update is expected to be available after 10/30/2026.